Avigilon Analytics Lighting Guide For Construction Sites

I am planning on using an Avigilon system with analytics to monitor a construction site. Though when the Avigilon analytics report came out exposing the low light performance it kind of got my hopes down because most construction sites have little to no lighting. I guess the options are thermal or ir illuminators. Thermal will drastically increase the price and out of the clients budget. So I am left with adding ir illuminators.

The site is 150m x 80m, based on the low light performance of the 3MP H4 (~110'/33m, PPF required 10) I am not even close to covering even the short side of the site with 2 H4's. And as for the long side even if I had multiple cameras on each end of the far side the middle would be a complete dead spot.

So my question is would ir illuminators help me cover this perimeter at night, and if so what is the appropriate way to install the ir illuminators for the best analytic performance? Do I assign an ir illuminator to each camera? If so I'm assuming the ir distance has to be greater than the specified range of the H4 (50m)? Or do I flood the area with a high power 300-400ft illuminator?

Can anyone help me implement a perimeter detection solution for these distances without the implementation of thermal? It is also important to note it is not possible to add a pole with cameras in the middle of the long side. I am hoping to accomplish this with varifocals and illuminators. White light illuminators are another possibility if performance increases or I may have to side with something like Bosch analytics where performance is not significantly affected below 1 lux.

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